This paper proposes a novel Pulse Width Modulation (PWM) switching technique based on Optimized Carrier Peaks-PWM (OCP-PWM) which can be used to control both single phase and three-phase multilevel inverters. The proposed PWM scheme is designed according to multi-peak selection on carriers a way to define the optimum values for carrier peaks and then minimizing the output voltage Total Harmonic Distortion ($TH{D}_v$), switching frequency (f_s), and also switching losses, in comparing with the other carrier-based PWM methods. To examine the performance of the presented PWM scheme, a five-level converter has been employed including six power MOSFETs to produce five level in the output. In comparison with typical PWM switching methods for single-phase inverters, the presented PWM scheme produces low harmonic components in the output voltage. To investigate the reliability of the presented PWM scheme for single-phase five-level converters a 2.5kVA/400 V prototype is carried out by applying a TMS320F28335 digital signal processor.

本文提出了一种基于优化载波峰值-PWM (OCP-PWM) 的新型脉宽调制 (PWM) 开关技术，可用于控制单相和三相多电平逆变器。所提出的 PWM 方案是根据载波上的多峰值选择设计的，一种定义载波峰值最佳值的方法，然后最小化输出电压总谐波失真 ($吨H{丁}_v$)、开关频率 ( f _s ) 以及开关损耗，与其他基于载波的 PWM 方法相比。为了检查所提出的 PWM 方案的性能，采用了一个五电平转换器，包括六个功率 MOSFET，以在输出中产生五个电平。与单相逆变器的典型 PWM 开关方法相比，所提出的 PWM 方案在输出电压中产生低谐波分量。为了研究所提出的用于单相五电平转换器的 PWM 方案的可靠性，我们通过应用 TMS320F28335 数字信号处理器制作了一个 2.5kVA/400V 原型。